add test of overloaded methods with particles

git-svn-id: https://svn.salilab.org/imp/trunk@16314 e91f8c7b-0e32-4433-a9ac-4502d39a4eab
remove useless swig directives

git-svn-id: https://svn.salilab.org/imp/trunk@16315 e91f8c7b-0e32-4433-a9ac-4502d39a4eab
clean up atom::Selection

git-svn-id: https://svn.salilab.org/imp/trunk@16316 e91f8c7b-0e32-4433-a9ac-4502d39a4eab
allow computation of rmsd on selection, closing #111

git-svn-id: https://svn.salilab.org/imp/trunk@16317 e91f8c7b-0e32-4433-a9ac-4502d39a4eab
more thorough test of overloading

git-svn-id: https://svn.salilab.org/imp/trunk@16318 e91f8c7b-0e32-4433-a9ac-4502d39a4eab
don't forget to add radii to particles

git-svn-id: https://svn.salilab.org/imp/trunk@16319 e91f8c7b-0e32-4433-a9ac-4502d39a4eab
move distance below Selection

git-svn-id: https://svn.salilab.org/imp/trunk@16320 e91f8c7b-0e32-4433-a9ac-4502d39a4eab
make swig have to work less hard

git-svn-id: https://svn.salilab.org/imp/trunk@16321 e91f8c7b-0e32-4433-a9ac-4502d39a4eab